matron: set thread names for easier debugging

giving explicitly created threads names makes it
substantially easier to narrow in on a particular
thread in gdb

matron/src/clocks/clock_internal.cc

@@ -83,6 +83,7 @@ static void clock_internal_start() {
 
     pthread_attr_init(&attr);
     pthread_create(&clock_internal_thread, &attr, &clock_internal_thread_run, NULL);
+    pthread_setname_np(clock_internal_thread, "clock_internal");
     pthread_attr_destroy(&attr);
 }
 

matron/src/clocks/clock_link.cc

@@ -105,6 +105,7 @@ void clock_link_start() {
     clock_link_shared_data.enabled = false;
 
     pthread_create(&clock_link_thread, &attr, &clock_link_run, NULL);
+    pthread_setname_np(clock_link_thread, "clock_link");
 }
 
 void clock_link_join_session() {

matron/src/clocks/clock_scheduler.cc

@@ -129,6 +129,7 @@ void clock_scheduler_start() {
 
     pthread_attr_init(&attr);
     pthread_create(&clock_scheduler_tick_thread, &attr, &clock_scheduler_tick_thread_run, NULL);
+    pthread_setname_np(clock_scheduler_tick_thread, "clock_sched_tick");
     pthread_attr_destroy(&attr);
 }
 

matron/src/device/device.cc

@@ -114,6 +114,8 @@ int dev_start(union dev *d) {
         fprintf(stderr, "m_init(): error creating thread\n");
         return -1;
     }
+    pthread_setname_np(d->base.tid, "device_loop");
+
     return 0;
 }
 

matron/src/device/device_monitor.cc

@@ -113,6 +113,7 @@ void dev_monitor_init(void) {
     if (s) {
         fprintf(stderr, "error creating thread\n");
     }
+    pthread_setname_np(watch_tid, "watch_loop");
     pthread_attr_destroy(&attr);
 }
 

matron/src/hardware/battery.cc

@@ -37,6 +37,7 @@ void battery_init() {
         if (pthread_create(&p, NULL, battery_check, 0)) {
             fprintf(stderr, "BATTERY: Error creating thread\n");
         }
+        pthread_setname_np(p, "battery_check");
     } else {
         fprintf(stderr, "BATTERY: FAIL.\n");
     }

matron/src/hardware/input.cc

@@ -27,6 +27,7 @@ int input_setup(matron_io_t *io) {
         fprintf(stderr, "ERROR (input %s) pthread error\n", io->ops->name);
         return err;
     }
+    pthread_setname_np(input->poll_thread, "input_poll");
 
     return 0;
 }

matron/src/hardware/stat.cc

@@ -33,6 +33,7 @@ void stat_init() {
     if (pthread_create(&p, NULL, stat_check, 0)) {
         fprintf(stderr, "STAT: Error creating thread\n");
     }
+    pthread_setname_np(p, "stat_check");
 }
 
 void stat_deinit() {

matron/src/input.cc

@@ -71,5 +71,6 @@ void input_init(void) {
     if (s != 0) {
         fprintf(stderr, "input_init(): error in pthread_create(): %d\n", s);
     }
+    pthread_setname_np(pid, "input_run");
     pthread_attr_destroy(&attr);
 }

matron/src/metro.cc

@@ -154,6 +154,7 @@ void metro_init(struct metro *t, uint64_t nsec, int count) {
         metro_handle_error(res, "pthread_create");
         return;
     } else {
+        pthread_setname_np(t->tid, "metro_loop");
         t->status = METRO_STATUS_RUNNING;
         if (res != 0) {
             metro_handle_error(res, "pthread_setschedparam");